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APAR status

Closed as program error.

Error description

In some rare cases when Media Manager retries a failed channel
program, it may not read or write all of the blocks that were
requested. Media Manager may terminate the request early. This
can occur for MIDAW or zHPF channel programs if redriven.

Local fix

Problem summary

****************************************************************
* USERS AFFECTED: All dfsms users at HDZ1C10 or higher *
****************************************************************
* PROBLEM DESCRIPTION: after a media manager retryable IO *
* error, a flag is left on which may *
* cause the retry of the failed IO to *
* terminate early. this may cause IO to *
* be incorrectly reported as complete. *
* Updates writes or reads may have been *
* skipped. *
****************************************************************
* RECOMMENDATION: *
****************************************************************

Problem conclusion

when calculating space for a channel program and a CI is added
to the channel program, the bit zzpllst will be set off. This
will clear this bit in case it was set on in a prior channel
program build path.
KEYWORDS: ZHPF/K
DATALOSS